Miley's B'day GiftGrabs a Handful of 'Big Booty Ho'

12/19/2012 6:00 AM PST

Miley Cyrus -- Grabs a Handful of 'Big Booty Ho' for Her Birthday

EXCLUSIVE

Miley Cyrus had a butt-naked birthday celebration -- latching on to a stripper's bare ass, and TMZ has the first pic of the awesome encounter ... inspired by none other than 2 Chainz!

Miley rang in her 20th last month with a house party in Hollywood ... and sources inside the bash tell us Miley's friends ordered a few strippers -- one of whom dropped a booty-shaking lap dance on the birthday girl.